Corner plate for derricks



@wh my W2@ Lmm c. W. LYNCH CORNER PLATE FOR DERRICKS Filed April 9, 1926 2 sneetsneet 'l ATTORNEY C, vw. LYNCH CORNER PLATE FOR DERRICKS Filed April 9, 1926 2 Sheets-Sheet 2 |NVENTOR ATTORNEY WITNESS:

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nectingnnd reinforcingl device which Snell adopted ttor connection ivitli v-Jooden lllt'i, Y

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eonnnn eltern Application niet tipi-n e,

'.lhe object ot this invention ie to provide n. cori-ier plete and ox construction for use in c nnnectiniN the structurel olen'ients of n, derriek, end cepecinlly lor connecting tbe :ibutA ting ends otnliningg leg1 members sind 'for .secinring1 trnnerei girts `to tbe lee; members.

A further Objectis to provide :i corner reinloroineY device which shell be adopted for use Iwith eng-le bnr diagonal braces or da@ onzil broeinrl rods tensionedby turnbrleldes.

il. inrtlier object is to provide n corner con-` inclnde inner und outer nngrle plzites n( tioned toliorin arbeit, the corner plates bei or with tnlnilnijinetnllie girts, the iioriner being' secured to the outer corner plates ond the letter beingsecnred to the inner corner plates. rlrjturtlier `object is to `provide n `particular torni of lock between the tubular nietzillie girts nndtlie corner element or elemente.

1llifitli the foregoing end other objects in View, tbe invei'ition consi ete in `tlie novel constriiction ,find nrrgnigeinent oit element-eI described7 illustrated rind clnirned, it beingi nnderstood tiret `niodiiicntione may be inode Within tbe scope oit the eliiinsy without de l'inrtiing from tli'e spirit of the invention.

ln tlie drawings 'forming pnrt ot this epplicntionf y i jlfignre l is n` View of tiie` construction in side elevation, the View showing e derriek` with tlie corner plntee employed in. tlie constrrietion thereof. i

llignreQA is n` perspective View, showing,- the bor. formed of tbe inner and outer corner pint xe, need nt tbe top et tbe derricli.

liignre 3 n- View in eleif'ntion, showing one of the-boxes employed et .the joints between the leg;v members9 tirait is, et the joints below tlie topl ol tbe derricllr.

ltiggtire 4; is e further View in' elevntion.

Figure is n, section on line oft' Fig! n re liejnre i is :i detnilview showing the edge lportion et the llnttened en d ot :i -tnbnlnr lnetzillie girt7 of the type illustrated in Fignre` 3w Figure 7 shows n .inoditied flirt and corner assembly involving;1 tbe rise of tire box strnctnrc comprising); inner end enter nnnjle plates,

und. adapted for connection Witli both girts ine Leitlinien eoivti sii-Wenn.

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tiln r nietnllic f bnttingl ends ot the legs neenn'ied to in eentrnliy corner if e, end tlieeleinents l0 :ind in ilinenie '1, :it tbe right ol lfigrnre 1, tliereilore ineet nt nbont tire Apoint indiceted by rct'ere ce ninnber il tlie corner construe` tion ol' end 5' being; employed in tnis position with reference to tire other structurel elements oit tire derrlclr.

',lbe enter corner plete includes llnng'ee l-l, :it :t rielit ijle fw'tli reference to o'neliiotlier, ein-l: oft e tleinges beiiigl lprovided. Witli Upper br lll; find lower lioles l5 in which reo-nel brncels nre secured. Round tie rods lieve earch nn end lioolr portion 1T thereon, nnd tbe opposite end portion is tiri-ended nt Il@ for engigenie'nt with n'. ttir`n '.lfliis element lnst nztnied hais @nient with rod or brittle 20, inder lioolt end nilnpte'd to ende e nner-titre l, in tli'e upper corner piaitefoii tbe side ol" (lie del-rickopposf e' to tlinton' which tire corner plete previously described .is mounted. A

A dingonal liriree'Ll extends :it nnV miele with brace 2() ind bins connection with the" corner platte positioned opposite tl'ie jjilii'tes nlr'ezidy referred to. 'lille central corner plates o'i" lignre l, nie-y be connected with the corner plntes nent below by b ices 25 and 2G, et pipeor :ingle bnr co'n'tinotion"7 these ele# ments 9,5 :ind EEG lintviiir1 ettened ends, :ipertnrelfh and. ndnpted to be seciired by bolts` siioli is 27, to the centrel :tngrle or C'ornei" plntes oit ltijrnre l.` fin additional bolt liole e in .'lenge :LEE is provided, in order that tlie seine type ot plete niny be need in otlier poeif tions on tlie deril'iclt, sindl in order "tlrfrtvtrnnsverse gljirts requiring;- seernl bolt holes inni-y be Secured to pin-tes l stond ot the girt '30, 'illnetrnted intlie centr-el portion of Fignre l and. having connections of the 'type Shown in lfignire 3.

The inner :ingle jplnte includes 't'lie flanges 3l. end 3&2, tbe liitter being' ont nwey, it del eirerb to provide openings tlie'retlirn, ind this inner angle ilnte especially includes the cnt nwnjv `oor n or slotted portion, designz'ited 33 pro. Y for the entrance ot' the extreme gittened portion lll of tubular girt L till C tbre dedl engr :ind the liitlli) ` 30, it being understood that this element is a metallic tubular member, as distinguished from the wooden girts referred to elsewhere.

Extending directly from flanges 3l and 32, are threaded devices 3'2"' and 3S, constituting pins orbolts adapted to pass thru apertures in the outer corner plate, these pins or bolts 37 and 38 being engaged by nuts 39 bearing on the surface oli tlanges '13. The inner corner plate is formed or cast metal, and the elements 3T and 38 extend in the plane of the 'lianges 3l and 32. A rounded surface is provided at 33 ifor engagen'ient by hook portion 34",; and the shoulder 40 initially spaced slightly from ilange 13 or the outer plate, in Figure 2, constitutes a vital feature, as it locks the heels'. end 34 ol' the girt in position aliter the latter has been inserted prior to the tightening of the nut on the pin Si".

nvFigure 4, it will be observed that vflange 3l is provided with a bolt hole at 3l', and the latter is adapted to receive a lowerrbolt such as 45, in Figure l, this bolt being engaged by nut 4G, and the bolt being adapted to pass thru'the upper end ot lower leg ll, at the lett of Figure 1. An upper bolt 4T passes thru the upper portion of outer corner plate, and also passes thru the leg member ll extendingupwardly from that plate.

In framing the structure, it is built up to a level delined by the four corner plates located opposite each other, andthe lower bolts are inserted, and pass thru the leg members 1l which have theirupper ends terminating at the middle portions of the corner plate at this level.y The upper section or next section ot' the structure, is then assembled, and the. leg members 11 of this section are secured by bolts 47 passing thru the` lower ends o't these particular elements 1l. it should be stated that the upper bolt 47 passes thru an aperture 47, in Figure 3, so positioned that the nutf for that bolt will be above the inner corner plate, whereas bolt passes thru aperture 31 of Figure 4.

By the use of this construction, all strains to which a derrick is subjected, owing to wind pressure.,and all strains resulting Jtrom use under normal conditions, and under extraordinary conditions, are resisted in a maximum degree. vThe particular type of lock between the tubular metallic girts and the corner plates aids'materially in eiteeting the result stated.

In the upper portion oit Figure l, and in Figure 2, I have shown a particular type of corner plate and corner boX, including the outer plate of angle ornrand including the flanges 13, the latter having upward extensions 13, each provided with an aperture such as 21 for engagement by hook port-ions ot transverse tie members or braces adapted to be placed under tension by turnbuekle 5G. Shoulders are termed lat 57, and the transverse beams 58 rest upon the upper ends ot members l0, or upon plates carried by said upper ends. rlransverse girts 59 are locked to the upper box structure including the inner and outer corner plates ot' Figure Q, the con.`v 'iction illustrated in this view last named h ing ziniilar in many respects to the construe on et Figures tl, 4 and 5, but the outer :einer plate olf 52 is especially designed lor use at the top oli the derrirl.

lt should he added that the shoulders (il) dir-,cent to the slots liorining the hook pora tions of the metallic, girls are at au angle, Conliornung to the angle ol' inclination of the, 1,

ijs ot the derrielq.

'llhe inner angle plate is t e'htly under size and provides play permitting the 'lirni clamping ot the plates on the legs when the nuts are screwed up.

The adaptability olI this corner plate or corner box to use with wooden girts, is an important teature, and in Figure T, the wooden girt (30 is secured by bolts (3l and 63, passing thru the [lange of the outer corner plate, the end of the wooden girt, and the end ot plate 64 abutting the inner corner plate, and being cut away at an angle conforming with the angle ol' inclination oit the derrick. Plates G4 may be separately secured to the ends of girts GO, and the construction here disclosed provides the rigidity already reterred to in connection with the use of the metallic girt.

Having thus described the invention, what is claimed is:

l. ln construction of the class described, au outer corner plate including flanges provided with apertures, an inner corner plate comprising flanges including extensions adapted to pass thru some of the apertures of the outer plates and to be secured to said plates, the corner plates being reverselyl positioned with reference to each other, and the inner corner plate including a slotted portion providing` a shoulder, and a girt having a slotted end portion and engaging said shoulder.

2. ln construction of the class described, an outer corner plate including flanges proided with apertures, an inner corner plate comprising flange including extensions adapted to pass thru some ot the apertures oli the outer plates and to be secured to said plates, the corner plates being reversely positioned with reference to each other, and the inner corner plate including a slotted portion providing a shoulder, and a girt having a slotted end portion and engaging said shoulder, the flanges of the outer plate projecting beyond the llanges oli the inner plate, and the ends of the girts being llattened adj acent to the projecting portions.

3. ln construction ol' the class described, an outer corner plate having llanges provided with apertures` an inner corner plate comprising lianges hzfzving the end portions thereo't abut ing the inner surfaces of the llanges lill) CII first nanied, the flanges of the inner corner plate being slotted at the edge portions there of, and girts having slotted end portions forming hooks engaging the slotted portions of tbe flanges and forming a lock joint betWeen the edges of the slot in tlie girt and the surface of the flanges.

ll. lln construction of the class described, an outer corner plate having flanges provided with apertures, an inner corner plate coniprising flanges having tlie end portions thereof abutting the inner snrifaces of tlie flanges first named, the flanges of tlie inner corner plate being slotted at the edge portions thereof, and girts having slotted end portions forming a loelr joint between tbe edges of the .slot in the girt and the surface of the flanges,

and the Walls adjacent to the slotted portion qui tall of the girt being eut to form e surface deflected with reference to the longitudinal axis of said girt.,

5 ln construction of the class described, an outer corner plate having flanges provided with apertures, an inner corner plate comprising flanges having tlie end portions thereof abutting' tlie inner surfaces ofthe flanges first named, the flanges of tbe .inner corner plate being slotted at the edge portions thereof, and girts llaving slotted end portions forming a lock joint between the edges of the slot in the girt and tlie surface of the flanges the flanges of the outer plate including upward extensions adapted to be secured to the upper transverse elements of a derricl.

ln testimony whereof l affix my signature.

CHARLES W. LYNCH. 

